264236981 has 2 divisors, whose sum is σ = 264236982. Its totient is φ = 264236980.

The previous prime is 264236977. The next prime is 264236993. The reversal of 264236981 is 189632462.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 185204881 + 79032100 = 13609^2 + 8890^2 .

It is a cyclic number.

It is not a de Polignac number, because 264236981 - 2² = 264236977 is a prime.

It is a super-2 number, since 2×264236981² = 139642364255988722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (264236381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132118490 + 132118491.

It is an arithmetic number, because the mean of its divisors is an integer number (132118491).

Almost surely, 2^264236981 is an apocalyptic number.

It is an amenable number.

264236981 is a deficient number, since it is larger than the sum of its proper divisors (1).

264236981 is an equidigital number, since it uses as much as digits as its factorization.

264236981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 124416, while the sum is 41.

The square root of 264236981 is about 16255.3677596048. The cubic root of 264236981 is about 641.6987592727.

The spelling of 264236981 in words is "two hundred sixty-four million, two hundred thirty-six thousand, nine hundred eighty-one".